公开(公告)号：US07835460B2

公开(公告)日：2010-11-16

申请号：US11303485

申请日：2005-12-15

申请人： Michael Mao Wang

发明人： Michael Mao Wang

IPC分类号： H04L27/10

CPC分类号： H04L25/0216 ,  H04L27/2647

摘要： Apparatus and methods for use in a wireless communication system are disclosed for reducing channel estimation noise in a device such as a wireless transceiver. A disclosed apparatus includes a processor that determines a channel activity portion and a noise portion of a channel estimation. The processor also determines a threshold noise level based on channel estimate values in the noise portion of the channel estimation. The processor compares channel estimate energy values in the channel estimation to the threshold noise level and sets each of the channel estimate energy values being less than the threshold noise level to a predetermined value such as zero in order to reduce or eliminate the noise. Similar methods are also disclosed.

摘要翻译： 公开了用于无线通信系统中的装置和方法，用于减少诸如无线收发器之类的装置中的信道估计噪声。 所公开的装置包括确定信道估计的信道活动部分和噪声部分的处理器。 处理器还基于信道估计的噪声部分中的信道估计值来确定阈值噪声电平。 处理器将信道估计中的信道估计能量值与阈值噪声电平进行比较，并将每个信道估计能量值小于阈值噪声电平设置为诸如零的预定值，以便减少或消除噪声。 还公开了类似的方法。

公开(公告)号：US20100285744A1

公开(公告)日：2010-11-11

申请号：US12722733

申请日：2010-03-12

申请人： Michael Mao Wang ,  Dhananjay Ashok Gore ,  Tadeusz Jarosinski

发明人： Michael Mao Wang ,  Dhananjay Ashok Gore ,  Tadeusz Jarosinski

IPC分类号： H04B7/14

CPC分类号： H04B7/15578

摘要： A method for computing a gain control metric used in controlling gain in a wireless repeater operates to store correlation and normalization values associated with the gain control metric for the previous N samples in registers. For each new sample of the gain control input signal, the correlation and normalization values are computed by discarding the multiplication terms of the obsolete sample and adding the multiplication terms of the new sample to the stored correlation and normalization values. In this manner, the complexity of the computation is greatly reduced and the complexity of the computation does not increase with the integration length.

摘要翻译： 用于计算用于控制无线中继器中的增益的增益控制度量的方法用于存储与寄存器中先前N个采样的增益控制度量相关联的相关和归一化值。 对于增益控制输入信号的每个新样本，通过舍弃过时采样的乘法项和将新采样的乘法项加到存储的相关和归一化值来计算相关和归一化值。 以这种方式，大大降低了计算的复杂度，并且计算的复杂度不会随着积分长度而增加。

公开(公告)号：US20100285740A1

公开(公告)日：2010-11-11

申请号：US12722730

申请日：2010-03-12

申请人： Michael Mao Wang ,  Dhananjay Ashok Gore ,  Gwendolyn Denise Barriac

发明人： Michael Mao Wang ,  Dhananjay Ashok Gore ,  Gwendolyn Denise Barriac

IPC分类号： H04B17/02

CPC分类号： H04B7/15578

摘要： A method for monitoring feedback loop stability in a wireless repeater includes measuring a gain control metric in the feedback loop of the repeater periodically for a given time period where the gain control metric is indicative of a loop gain of the feedback loop of the repeater; and monitoring the magnitude of the gain control metric to determine the stability of the feedback loop of the repeater. In operation, a large magnitude of the gain control metric indicates instability in the feedback loop of the repeater.

摘要翻译： 一种用于监测无线中继器中的反馈环路稳定性的方法包括在给定的时间周期周期性地测量中继器的反馈环路中的增益控制度量，其中增益控制度量指示中继器的反馈环路的环路增益; 并监视增益控制度量的大小以确定中继器的反馈回路的稳定性。 在操作中，大幅度的增益控制度量指示中继器的反馈回路中的不稳定性。

公开(公告)号：US20100284445A1

公开(公告)日：2010-11-11

申请号：US12609579

申请日：2009-10-30

申请人： Gwendolyn Denise Barriac ,  Dhananjay Ashok Gore ,  James Arthur Proctor, JR. ,  Michael Mao Wang ,  Tao Tian

发明人： Gwendolyn Denise Barriac ,  Dhananjay Ashok Gore ,  James Arthur Proctor, JR. ,  Michael Mao Wang ,  Tao Tian

IPC分类号： H04B3/36

CPC分类号： H04B7/15535 ,  H04B7/15585 ,  H04L27/2607 ,  H04L27/2613

摘要： In one embodiment, a device for constructing a pilot signal for use in a wireless repeater where the pilot signal is added to a transmit signal includes one or more pilot generators. Each pilot generator generates a carrier pilot signal associated with a single carrier of the transmit signal and the carrier pilot signals generated by the one or more pilot generators are summed to generate the pilot signal. Each of the one or more pilot generators includes a pilot symbol unit providing multiple data symbols having a predetermined data structure as the carrier pilot signal, a pilot scrambler, a filter, a pilot power determination unit, and a cyclic prefix insertion unit for inserting a cyclic prefix, to the carrier pilot signal. In another embodiment, the pilot symbol unit providing multiple data symbols in frequency domain as the carrier pilot signal.

摘要翻译： 在一个实施例中，用于构建在无线中继器中使用的导频信号的装置，其中导频信号被添加到发射信号包括一个或多个导频发生器。 每个导频发生器产生与发送信号的单个载波相关联的载波导频信号，并且由一个或多个导频发生器产生的载波导频信号相加以产生导频信号。 一个或多个导频发生器中的每一个包括导频符号单元，其提供具有作为载波导频信号的预定数据结构的多个数据符号，导频扰频器，滤波器，导频功率确定单元和循环前缀插入单元， 循环前缀，到载波导频信号。 在另一个实施例中，导频符号单元在频域中提供多个数据符号作为载波导频信号。

公开(公告)号：US07720027B2

公开(公告)日：2010-05-18

申请号：US11495480

申请日：2006-07-27

申请人： Fuyun Ling ,  Murali Ramaswamy Chari ,  Rajiv Vijayan ,  Ashok Mantravadi ,  Alok Kumar Gupta ,  Krishna Kiran Mukkavilli ,  Michael Mao Wang ,  Bojan Vrcelj ,  Bruce Collins

发明人： Fuyun Ling ,  Murali Ramaswamy Chari ,  Rajiv Vijayan ,  Ashok Mantravadi ,  Alok Kumar Gupta ,  Krishna Kiran Mukkavilli ,  Michael Mao Wang ,  Bojan Vrcelj ,  Bruce Collins

IPC分类号： H04W4/00

CPC分类号： H04L1/0002 ,  H04L1/0017 ,  H04L1/0041 ,  H04L1/0075 ,  H04L5/0007 ,  H04L5/0048 ,  H04L27/2613 ,  H04L27/2647 ,  H04L27/2662 ,  H04L69/32 ,  H04W48/08 ,  H04W72/005 ,  H04W80/00 ,  H04W88/02 ,  H04W92/10

摘要： Systems and methods are provided for processing forward link only (FLO) signals. A device receives a FLO signal, processes a TDM pilot comprising a TDM Pilot 1, a TDM Pilot 2, a WIC, a LIC, a Transition Pilot Channel, and a Positioning Pilot, from the FLO signal, processes an overhead information symbol (OIS) comprising a wide-area OIS and a local-area OIS, from the FLO signal, processes an FDM pilot comprising a wide-area FDM pilot and a local-area FDM pilot, from the FLO signal; and processes data comprising wide-area data and local-area data, from the FLO signal.

摘要翻译： 提供系统和方法用于仅处理前向链路（FLO）信号。 设备接收FLO信号，从FLO信号处理包括TDM导频1，TDM导频2，WIC，LIC，转换导频信道和定位导频的TDM导频，处理开销信息符号（OIS ）包括来自FLO信号的广域OIS和局域OIS，从FLO信号处理包括广域FDM导频和本地FDM导频的FDM导频; 并从FLO信号处理包括广域数据和局域数据的数据。

公开(公告)号：US07693124B2

公开(公告)日：2010-04-06

申请号：US11133089

申请日：2005-05-18

申请人： Jai N. Subrahmanyam ,  Kevin Stuart Cousineau ,  Michael Mao Wang

发明人： Jai N. Subrahmanyam ,  Kevin Stuart Cousineau ,  Michael Mao Wang

IPC分类号： G06F15/16

CPC分类号： H04L5/0048 ,  H04L5/0007 ,  H04L25/0226 ,  H04L27/2602

摘要： In an OFDM system, multiple (M) interlaces are defined for M non-overlapping sets of frequency subbands, and M slots with fixed indices are also defined. Data streams and pilot are mapped to slots, which are in turn mapped to interlaces based on a slot-to-interlace mapping scheme that can achieve frequency diversity and good performance for all slots. At a transmitter, a slot-to-interlace converter maps the slots to the interlaces. The slot-to-interlace converter includes multiple multiplexers and a control unit. The multiplexers map the M slots to the M interlaces based on the slot-to-interlace mapping scheme. The control unit generates at least one control signal for the multiplexers. The multiplexers may be arranged and controlled in various manners depending on the slot-to-interlace mapping scheme. At a receiver, a complementary interlace-to-slot converter maps the interlaces to the slots.

摘要翻译： 在OFDM系统中，为M个非重叠的频率子带组定义多个（M）交织，并且还定义具有固定索引的M个时隙。 数据流和导频被映射到时隙，这些时隙又被映射到基于可以实现所有时隙的频率分集和良好性能的时隙到交织映射方案的交错。 在发射机处，时隙到隔行转换器将时隙映射到交织。 时隙到隔行转换器包括多个多路复用器和一个控制单元。 多路复用器基于时隙到交错映射方案将M个时隙映射到M个交织。 控制单元为多路复用器生成至少一个控制信号。 可以根据时隙到交错映射方案以多种方式来布置和控制多路复用器。 在接收机处，互补的交错到时隙转换器将交织器映射到时隙。

公开(公告)号：US07583584B2

公开(公告)日：2009-09-01

申请号：US11193053

申请日：2005-07-29

申请人： Michael Mao Wang ,  Fuyun Ling ,  Murali Ramaswamy Chari ,  Rajiv Vijayan

发明人： Michael Mao Wang ,  Fuyun Ling ,  Murali Ramaswamy Chari ,  Rajiv Vijayan

IPC分类号： H04J11/00 ,  H04J3/06

CPC分类号： H04L1/0071 ,  H01R24/38 ,  H03M13/27 ,  H03M13/271 ,  H03M13/2757 ,  H03M13/276 ,  H03M13/2771 ,  H04L1/00 ,  H04L1/0041 ,  H04L1/0066 ,  H04L1/007 ,  H04L5/0007 ,  H04L5/0042 ,  H04L5/0044 ,  H04L5/0048 ,  H04L5/0083 ,  H04L25/0226 ,  H04L27/2607 ,  H04L27/261 ,  H04L27/2626 ,  H04L27/2656 ,  H04L27/2662

摘要： A system and method for time diversity uses interleaving. To simplify the operation at both transmitters and receivers, a formula can be used to determine the mapping from slot to interlace at a given OFDM symbol time.

摘要翻译： 用于时间分集的系统和方法使用交织。 为了简化发射机和接收机的操作，可以使用公式来确定在给定OFDM符号时间从时隙到交错的映射。

公开(公告)号：US20090116574A1

公开(公告)日：2009-05-07

申请号：US12265310

申请日：2008-11-05

申请人： Michael Mao Wang

发明人： Michael Mao Wang

IPC分类号： H04B7/02

CPC分类号： H04L27/2626 ,  H04L5/0007

摘要： A method for receive power unification for multiple-input and multiple-output (MIMO) and non-MIMO signaling is described. A data stream may be separated into multiple individual data streams for transmission by multiple transmit antennas. Orthogonal frequency division multiplexing (OFDM) may be applied to the individual data streams to obtain one or more OFDM symbols. Unification processing may be applied to an OFDM symbol. Individual data streams may be transmitted using multiple transmit antennas.

摘要翻译： 描述了用于多输入和多输出（MIMO）和非MIMO信令的接收功率统一的方法。 数据流可以被分成多个单独的数据流，以便由多个发射天线发射。 正交频分复用（OFDM）可以应用于各个数据流以获得一个或多个OFDM符号。 统一处理可以应用于OFDM符号。 单个数据流可以使用多个发射天线发射。

公开(公告)号：US20080304603A1

公开(公告)日：2008-12-11

申请号：US11690590

申请日：2007-03-23

申请人： Michael Mao Wang

发明人： Michael Mao Wang

IPC分类号： H04L27/08

CPC分类号： H04L27/2647 ,  H03G3/005 ,  H03G3/3078

摘要： Methods and apparatus for initial acquisition gain control in a communication system a method for use in a wireless communication system are disclosed. A disclosed methodology includes measuring the power of a signal received by a transceiver a number of times over a prescribed time period, the signal including a number of symbols. A gain of the transceiver is unidirectionally adjusted when a currently measured power is greater than a previously measured power during the prescribed time period until a maximal power level is measured. By adjusting the gain to accommodate a maximal power value, which is the same as the power level of an acquisition pilot symbol, overshoot and distortion by the transceiver are avoided during initial timing and frequency acquisition. Corresponding apparatus are also disclosed.

摘要翻译： 公开了一种用于无线通信系统中的通信系统中的初始采集增益控制的方法和装置。 公开的方法包括在规定的时间周期内测量由收发器接收的信号的功率，该信号包括多个符号。 当在当前测量的功率大于在规定的时间周期内直到测量最大功率电平之前的先前测量的功率时，单向调整收发器的增益。 通过调整增益以适应与采集导频符号的功率电平相同的最大功率值，在初始定时和频率采集期间避免了收发器的过冲和失真。 还公开了相应的装置。

公开(公告)号：US07463910B2

公开(公告)日：2008-12-09

申请号：US11271409

申请日：2005-11-09

申请人： Michael Mao Wang ,  Fuyun Ling ,  Rajiv Vijayan

发明人： Michael Mao Wang ,  Fuyun Ling ,  Rajiv Vijayan

IPC分类号： H04M1/00 ,  H04B1/16

CPC分类号： H04W52/029 ,  Y02D70/00

摘要： Apparatus and methods for estimating the frequency of a sleep or slow clock by selectively utilizing an estimated sleep clock frequency and an estimated change in the sleep clock frequency. The disclosed apparatus includes a sleep clock frequency estimator to output a fast clock derived sleep clock frequency estimate and a sleep clock change frequency estimator to output an estimate of a change in frequency of the sleep clock. The apparatus further includes a combiner that weights at least one of the fast clock derived sleep clock frequency estimate to obtain a weighted sleep clock frequency estimate and the estimate of the change in frequency of the sleep clock to obtain a weighted estimate of the change in frequency of the sleep clock. The combiner also determines a new estimate of the sleep clock frequency using at least one of the weighted sleep clock frequency estimate and the weighted estimate of the change in frequency of the sleep clock. Complementary methods are also disclosed.

摘要翻译： 通过选择性地利用估计的睡眠时钟频率和睡眠时钟频率的估计改变来估计睡眠或慢时钟的频率的装置和方法。 所公开的装置包括：睡眠时钟频率估计器，用于输出快速时钟导出的睡眠时钟频率估计;以及睡眠时钟变化频率估计器，用于输出睡眠时钟的频率变化的估计。 该装置还包括组合器，其对至少一个快速时钟导出的睡眠时钟频率估计进行加权以获得加权睡眠时钟频率估计和睡眠时钟的频率变化的估计，以获得频率变化的加权估计 的睡眠时钟。 组合器还使用加权睡眠时钟频率估计和睡眠时钟的频率变化的加权估计中的至少一个来确定睡眠时钟频率的新估计。 还公开了互补方法。